docs: def activateAaPdpContextAccept(ProtocolConfigurationOptions_presence=0,
                                 GprsTimer_presence=0):
      """ACTIVATE AA PDP CONTEXT ACCEPT Section 9.5.11"""
      a = TpPd(pd=0x8)
      b = MessageType(mesType=0x51)  # 01010001
      c = LlcServiceAccessPointIdentifier()
      d = QualityOfService()
      e = MobileId()
      f = PacketDataProtocolAddress()
      g = RadioPriorityAndSpareHalfOctets()
      packet = a / b / c / d / e / f / g
      if ProtocolConfigurationOptions_presence is 1:
          i = ProtocolConfigurationOptions(ieiPCO=0x27)
          packet = packet / i
      if GprsTimer_presence is 1:
          j = GprsTimer(ieiGT=0x29)
          packet = packet / j
      return packet